We are new to using Zimbra, so please be gentle.
We have just set up our e-mail domain using VMWare Zimbra. It is working pretty good so far. It is hosting emails to a group of subcontractors.
Because of how we are using this, we would like to limit the incoming email to a specific domain. We want this group of subcontractors to only be able to receive email from our other company domain to these email accounts.
How can I do this?